Disorder is distraction, and every distraction on the court is a potential turning point.

Darren opens two cans of balls and shoves two balls in his pocket. I take a gulp of Gil Water, then a last leak before warm-ups. James, the security guard, leads us into the tunnel. As usual he’s squeezed into a tight yellow security shirt, and he gives me a wink, as if to say, We security guards are supposed to be impartial, but I’m rooting for you.

James has been at the U.S. Open almost as long as I have. He’s led me down this tunnel before and after glorious wins and excruciating losses. Large, kind, with tough-guy scars that he wears with pride, James is a bit like Gil. It’s almost as though he takes over for Gil during those few hours on the court, when I’m outside Gil’s sphere of influence. There are people you count on seeing at the U.S. Open—office staffers, ball boys, trainers—and their presence is always reassuring. They help you remember where and who you are. James is at the top of that list. He’s one of the first people I look for when I walk into Arthur Ashe Stadium. Seeing him, I know I’m back in New York, and I’m in good hands.

Ever since 1993, when a spectator in Hamburg rushed onto the court and stabbed Monica Seles during a match, the U.S. Open has positioned one security guard behind each player’s chair during all breaks and changeovers. James always makes sure to be the one behind my chair. His inability to remain impartial is endlessly charming. During a grueling match, I’ll often catch James looking concerned, and I’ll whisper, Don’t worry, James, I’ve got this chump today. It always makes him chuckle.

Now, walking me out to the practice courts, he’s not chuckling. He looks sad. He knows that this could be our last night together. Still, he doesn’t deviate from our pre-match ritual. He says the same thing he always says: